Regular verb: assist - assisted - assisted
Simple form | V-ing form |
I must assist you must assist he must assist we must assist you must assist they must assist | I must be assisting you must be assisting he must be assisting we must be assisting you must be assisting they must be assisting |
Perfect | V-ing perfect |
I must have assisted you must have assisted he must have assisted we must have assisted you must have assisted they must have assisted | I must have been assisting you must have been assisting he must have been assisting we must have been assisting you must have been assisting they must have been assisting |
Simple form | V-ing form |
I mustn't assist you mustn't assist he mustn't assist we mustn't assist you mustn't assist they mustn't assist | I mustn't be assisting you mustn't be assisting he mustn't be assisting we mustn't be assisting you mustn't be assisting they mustn't be assisting |
Perfect | V-ing perfect |
I mustn't have assisted you mustn't have assisted he mustn't have assisted we mustn't have assisted you mustn't have assisted they mustn't have assisted | I mustn't have been assisting you mustn't have been assisting he mustn't have been assisting we mustn't have been assisting you mustn't have been assisting they mustn't have been assisting |
Simple form | V-ing form |
must I assist? must you assist? must he assist? must we assist? must you assist? must they assist? | must I be assisting? must you be assisting? must he be assisting? must we be assisting? must you be assisting? must they be assisting? |
Perfect | V-ing perfect |
must I have assisted? must you have assisted? must he have assisted? must we have assisted? must you have assisted? must they have assisted? | must I have been assisting? must you have been assisting? must he have been assisting? must we have been assisting? must you have been assisting? must they have been assisting? |
Simple form | V-ing form |
mustn't I assist? mustn't you assist? mustn't he assist? mustn't we assist? mustn't you assist? mustn't they assist? | mustn't I be assisting? mustn't you be assisting? mustn't he be assisting? mustn't we be assisting? mustn't you be assisting? mustn't they be assisting? |
Perfect | V-ing perfect |
mustn't I have assisted? mustn't you have assisted? mustn't he have assisted? mustn't we have assisted? mustn't you have assisted? mustn't they have assisted? | mustn't I have been assisting? mustn't you have been assisting? mustn't he have been assisting? mustn't we have been assisting? mustn't you have been assisting? mustn't they have been assisting? |